code: def vec_cost_function(params):
      return data(params)[1] - datapts
  
file_path: mystic/examples/rosetta_parabola.py
imports: from math import pi
  from numpy import array, real, conjugate
  import numpy
  import matplotlib.pyplot
label_desc: Use image node_id 3 for calling a global function with example usage: vec_cost_function(params) and returns: unknown